AQP4 and myeloid sarcoma: On the contrary, in a single-institution study targeting a small and diverse cohort, Havla and colleagues reported significantly lower global pRNFL thickness in MOG-IgG+ON compared with AQP4-IgG+ON and MS-associated ON, while the non-ON eyes in MOG-IgG+ patients had significantly thinner T quadrants compared with the non-ON eyes of the MS and NMOSD patients [27].